When Macadoo is a colt, he challenges his father, a huge Belgian stallion, in order to protect his mother and the rest of the herd. From that moment on, Mac knows that his purpose in life is to help and serve others however he can. Though Macadoo endures much adversity, he finds the courage to 'walk on' through even the most difficult circumstances. Told from Macadoo's point of view and featuring beloved characters from Chancey of the Maury River.